WRITE A PROGRAM ON QUICK -SORT:-
#include <stdio.h>
#include <stdbool.h>
#define MAX 7
int intArray[MAX] = {4,6,3,2,1,9,7};
void printline(int count) {
int i;
for(i = 0;i <count-1;i++) {
printf("=");
}
printf("=\n");
}
void display() {
int i;
printf("[");
// navigate through all items
for(i = 0;i<MAX;i++) {
printf("%d ",intArray[i]);
}
printf("]\n");
}
void swap(int num1, int num2) {
int temp = intArray[num1];
intArray[num1] = intArray[num2];
intArray[num2] = temp;
}
int partition(int left, int right, int pivot) {
int leftPointer = left -1;
int rightPointer = right;
while(true) {
while(intArray[++leftPointer] < pivot) {
//do nothing
}
while(rightPointer > 0 && intArray[--rightPointer] > pivot) {
//do nothing
}
if(leftPointer >= rightPointer) {
break;
} else {
printf(" item swapped :%d,%d\n", intArray[leftPointer],intArray[rightPointer]);
swap(leftPointer,rightPointer);
}
}
printf(" pivot swapped :%d,%d\n", intArray[leftPointer],intArray[right]);
swap(leftPointer,right);
printf("Updated Array: ");
display();
return leftPointer;
}
void quickSort(int left, int right) {
if(right-left <= 0) {
return;
} else {
int pivot = intArray[right];
int partitionPoint = partition(left, right, pivot);
quickSort(left,partitionPoint-1);
quickSort(partitionPoint+1,right);
}
}
main() {
printf("Input Array: ");
display();
printline(50);
quickSort(0,MAX-1);
printf("Output Array: ");
display();
printline(50);
}
OUTPUT:-
#include <stdio.h>
#include <stdbool.h>
#define MAX 7
int intArray[MAX] = {4,6,3,2,1,9,7};
void printline(int count) {
int i;
for(i = 0;i <count-1;i++) {
printf("=");
}
printf("=\n");
}
void display() {
int i;
printf("[");
// navigate through all items
for(i = 0;i<MAX;i++) {
printf("%d ",intArray[i]);
}
printf("]\n");
}
void swap(int num1, int num2) {
int temp = intArray[num1];
intArray[num1] = intArray[num2];
intArray[num2] = temp;
}
int partition(int left, int right, int pivot) {
int leftPointer = left -1;
int rightPointer = right;
while(true) {
while(intArray[++leftPointer] < pivot) {
//do nothing
}
while(rightPointer > 0 && intArray[--rightPointer] > pivot) {
//do nothing
}
if(leftPointer >= rightPointer) {
break;
} else {
printf(" item swapped :%d,%d\n", intArray[leftPointer],intArray[rightPointer]);
swap(leftPointer,rightPointer);
}
}
printf(" pivot swapped :%d,%d\n", intArray[leftPointer],intArray[right]);
swap(leftPointer,right);
printf("Updated Array: ");
display();
return leftPointer;
}
void quickSort(int left, int right) {
if(right-left <= 0) {
return;
} else {
int pivot = intArray[right];
int partitionPoint = partition(left, right, pivot);
quickSort(left,partitionPoint-1);
quickSort(partitionPoint+1,right);
}
}
main() {
printf("Input Array: ");
display();
printline(50);
quickSort(0,MAX-1);
printf("Output Array: ");
display();
printline(50);
}
OUTPUT:-
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